The present invention relates generally to a method and system for communicating over a telecommunications network between a service provider and one or more users, wherein the service provider has access to multiple distinct addresses in the telecommunications network and each user is identified by an address, more specifically where a first message can be sent over at least a portion of the telecommunications network to a user's address, the reply address of the message having a first reply address selected from the multiple distinct addresses and determining, based on a reply from a user's address to the first reply address, a second message and a second reply address, wherein the second reply address can be selected from the available multiple distinct addresses and is distinct from the first reply address.